linux-kernel - Re: [PATCH v3 02/25] drm: core: fix common struct sg

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Message-ID: <20200508071609.GA31690@lst.de>
Date:   Fri, 8 May 2020 09:16:09 +0200
From:   Christoph Hellwig <hch@....de>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     Christoph Hellwig <hch@....de>, dri-devel@...ts.freedesktop.org,
        iommu@...ts.linux-foundation.org, linaro-mm-sig@...ts.linaro.org,
        linux-kernel@...r.kernel.org, Robin Murphy <robin.murphy@....com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-arm-kernel@...ts.infradead.org,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: [PATCH v3 02/25] drm: core: fix common struct sg_table related
 issues

On Fri, May 08, 2020 at 09:12:13AM +0200, Marek Szyprowski wrote:
> Then we would just need one more helper to construct scatterlist, as the 
> above two are read-only don't allow to modify scatterlist:
> 
> #define for_each_sgtable_sg(sgt, sg, i)                \
>         for_each_sg(sgt->sgl, sg, sgt->orig_nents, i)
> 
> With the above 3 helpers we can probably get rid of all instances of 
> sg_table->{nents,orig_nents} from the DRM code. I will prepare patches soon.

Sounds great, thanks!